List all countries with available public holiday data.
AI agents call holidays_countries to retrieve information from Mcp Everything without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool simply enumerates available data without side effects. It is a read-only query that retrieves a static list of countries for which holiday data exists. No data is created, modified, deleted, or executed. This falls squarely into the Read category with low severity since misuse poses minimal risk (e.g., an AI agent cannot cause harm by listing countries).
From the tool's definition Tool name 'holidays_countries' and description 'List all countries with available public holiday data' indicate a query/list operation that retrieves metadata about supported countries—no modification, deletion, or execution of external operations.
Attacks that exploit this kind of access
List all countries with available public holiday data. It is categorised as a Read tool in the Mcp Everything MCP Server, which means it retrieves data without modifying state.
Register the Mcp Everything MCP server in PolicyLayer and add a rule for holidays_countries: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Mcp Everything. Nothing to install.
holidays_countries is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the holidays_countries rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for holidays_countries. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
holidays_countries is provided by the Mcp Everything MCP server (wellix260/mcp-everything). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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